Can’t help you with nothing to help with
I believe the answer is B. They were no longer able to acquire the necessary characteristics for survival in a changing environment. I think it is B. because trilobites mostly went extinct because of the event that wiped out 95% of Earth's species. So they didn't have the characteristics to survive. Hope I helped!
Answer:
In a postsynaptic cell/neuron where a depolarizing change in the membrane potential surpasses the threshold.
Explanation:
Generally, in an excitable cell, the neurotransmitter binding opens the ligand-gated channels at the synapse. Here only the entrance of the ions will not stimulate the action potential. They must exceed the threshold. Hence, an action potential will only get incited when in a postsynaptic cell/neuron, a depolarizing change in the membrane potential surpasses the threshold.
Answer:
the first option is correct
Explanation:
in a food pyramid the base is always producers.
